But the British Lions star is in the Ospreys' squad for the clash with Ulster on Saturday, putting him in line for the autumn series for Wales in November.
Ospreys coach Sean Holley said: "Gavin is likely to start on the bench. He's trained really hard and it's been a positive comeback for him.
"He's in a really great place mentally and has approached his rehab in a very mature manner. He's grown up and has a solid family life - that's helped.
"It's great timing for both Gavin and for us with so many important matches coming up. Game-time is the next step for him."
Henson's recovery is a huge boost for Wales coach Warren Gatland who must wait on Ospreys team-mate Mike Phillips after the scrum-half suffered a minor setback from knee reconstruction last week.
Wales face South Africa on November 8 before clashes with Canada, New Zealand and Australia.
Shane Williams could return having missed the defeat to Leinster with a leg injury but Lee Byrne is a doubt with a stomach upset.
Ospreys Squad: Lee Byrne, Tommy Bowe, Shane Williams, Nikki Walker, Andrew Bishop, Gavin Henson, James Hook, Daniel Biggar, Rhodri Wells, Rhys Webb, Duncan Jones, Paul James, Adam Jones, Huw Bennett, Richard Hibbard, Ian Gough, Andrew Lloyd, Alun-Wyn Jones, Ian Evans, Jonathan Thomas, Tom Smith, Ryan Jones, Marty Holah.